Arcane Soul Fire

An arcane-fused, soul powered, Azul flame, burning with concentrated intensity forms over the palm of your hand. The caster throws it and in a flashing streak it thunders towards the target within range and then blossoms with a loud roar into an explosion of flames. Each creature in a 20-foot-radius sphere centered on that point must make an Arcana saving throw. The target takes 5d8 +Cha modifier fire damage and 5d8 +Cha modifier force damage on a failed save, or half as much damage on a successful one. 

The target also receives burning status for 5 minutes if failed Arcana saving throw.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.